Here everything is duality, relative knowledge, relative world, but in the absolute world everything is one, spirit. Here . . . because here we have got experience two energies, spiritual energy and material energy, working. The material energies are the physical elements, bhūmir āpo 'nalo vāyuḥ (BG 7.4): earth, water, fire, air, sky and, in subtle form, mind, intelligence, ego. They are all material. Mind is also material, intelligence is also material, but they are subtle forms. And spiritual existence is the living entity, as we are. These things are very nicely explained in the Bhagavad-gītā. Apareyam itas tu viddhi me prakṛtiṁ parām. The material, physical elements, they are inferior quality of . . . inferior quality, energy, of Kṛṣṇa. But the superior quality of energy we are, living entities. Jīva-bhūtāṁ mahā-bāho yayedaṁ dhāryate jagat (BG 7.5).
Therefore here in this material world there are two energies working. In the spiritual world there is only spiritual energy working. But in the material world, two energies are working: material and spiritual. Material energy is dependent on spiritual energy. Spiritual energy is prominent everywhere, in this material world and the spiritual world. Here also, the matter is developing upon spirit, not that spirit is manifesting under certain conditional stage of matter. That is a wrong theory.